Journals →  Eurasian mining →  2019 →  #2 →  Back

PROCESSING AND COMPLEX USAGE OF MINERAL RAW MATERIALS
ArticleName Treatment of phosphoric acid sludge for rare earths recovery III: comparison of sawdust filter aid as body feed with pre-coating
DOI 10.17580/em.2019.02.11
ArticleAuthor Allaedini G., Zhang P.
ArticleAuthorData

 Florida Industrial and Phosphate Research Institute, Florida Polytechnic University, Lakeland, United States:

Allaedini G., PhD Chemical Engineering, jiny_ghazaleh@yahoo.com
Zhang P., Director of Beneficiation and Mining

Abstract

Extra fine sawdust has been utilized as a filter aid for the filtration of the phosphoric acid sludge and recovery of Rare Earth Elements (REE). Results show that the addition of sawdust as a filter aid enhances the filtration in terms of solid residue retained and the quality of either the recovered acid when applied as a precoat or a body feed. It was found that an increase of sawdust dosage above 0.5% reduced REE distribution in the final solid residue with a slight increase in the rate of filtration up to 1%. Application of sawdust as a pre-coat resulted in a final dried solid product containing less phosphorus. This study showed that sawdust could be employed as a low-cost commercial filter aid for treatment of the phosphoric acid sludge for recovery of REE, as well as the phosphoric acid value.

keywords Phosphoric acid sludge, sawdust, filter aids, rare earths elements
References

1. Tarleton S., Wakeman R. Solid/liquid separation: principles of industrial filtration. Elsevier, 2005.
2. Wakeman R. The influence of particle properties on filtration. Separation and Purification Technology. 2007. Vol. 58, No. 2. pp. 234–241.
3. Qi Ying, Thapa K. B., Hoadley A. F. A. Application of filtration aids for improving sludge dewatering properties — a review. Chemical Engineering Journal. 2011. Vol. 171, No. 2. pp. 373–384.
4. Sulpizio T. E. Advances in filter aid and pre-coat filtration technology. Advances in filtration and separation technology. 1999. Vol. 13, No. A. pp. 371–371.
5. Wang L. K. Diatomaceous earth precoat filtration. Advanced Physicochemical Treatment Processes. Humana Press, 2006. pp. 155–189.
6. Baig T. H., Garcia A. E., Tiemann K. J., Gardea-Torresdey J. L. Adsorption of heavy metal ions by the biomass of Solanum elaeagnifolium (Silverleaf night-shade). Proceedings of the 1999 Conference on Hazardous Waste Research. 1999. Vol. 131.
7. Salem Boorujy. Apparatus for filtering liquid. U.S. Patent 3,037,635 ; issued 5.06.1962.
8. Teemu K., Golmaei M., Häkkinen A. Use of filter aids to improve the filterability of enzymatically hydrolyzed biomass suspensions. Industrial & Engineering Chemistry Research. 2013. Vol. 52, No. 42. pp. 14955–14964.
9. Bajpai Pratima. Biermann’s Handbook of Pulp and Paper. Elsevier, 2018. Vol. 2: Paper and Board Making.
10. Rominiyi O. L., Adaramola B. A., Ikumapayi O. M., Oginni O. T., Akinola S. A. Potential Utilization of Sawdust in Energy, Manufacturing and Agricultural Industry; Waste to Wealth. World Journal of Engineering and Technology. 2017. Vol. 5, No. 3. 526 p.
11. Svarovsky L. Introduction to solid-liquid separation. Solid-Liquid Separation. 4th Ed. 2001. pp. 1–29.
12. Tiller F. M. Mechanisms of flow through compressible porous beds in sedimentation, filtration, centrifugation, deliquoring, and ceramic processing. No. DOE/ER/13786-T3. Houston Univ., TX (United States). Dept. of Chemical Engineering, 1992.
13. Das N., Das D. Recovery of rare earth metals through biosorption: an overview. Journal of Rare Earths. 2013. Vol. 31, No. 10. pp. 933–943.
14. Koen B., Pontikes Y., Jones P. T., van Gerven T., Blanpain B. Recovery of rare earths from industrial waste residues: a concise review. Proceedings of the 3rd International Slag Valorisation Symposium: The Transition to Sustainable Materials Management. 2013. pp. 191–205.
15. Purchas D. B., Sutherland K. (eds.) Handbook of filter media. Oxford; New York : Elsevier Advanced Technology, 2002.
16. Yang Wen-ching (ed.). Handbook of fluidization and fluid-particle systems. CRC press, 2003.
17. Gan Wentao, Likun Gao, Xianxu Zhan, Jian Li. Preparation of thiol-functionalized magnetic sawdust composites as an adsorbent to remove heavy metal ions. RSC Advances. 2016. Vol. 6, No. 44. pp. 37600–37609.
18. Wu Shengxi, Liangshi Wang, Longsheng Zhao, Patrick Zhang, Hassan El-Shall, Brij Moudgil, Xiaowei Huang, and Lifeng Zhang. Recovery of rare earth elements from phosphate rock by hydrometallurgical processes–A critical review. Chemical Engineering Journal. 2018. Vol. 335. pp. 774–800.

Full content Treatment of phosphoric acid sludge for rare earths recovery III: comparison of sawdust filter aid as body feed with pre-coating
Back